[28975] in North American Network Operators' Group
Re: pop server in an ISP environment
daemon@ATHENA.MIT.EDU (Rick Kelly)
Mon May 29 21:34:18 2000
From: Rick Kelly <rmk@toad.rmkhome.com>
Message-Id: <200005300132.e4U1W8A06115@toad.rmkhome.com>
In-Reply-To: <20000529225227.82CE0DE@proven.weird.com> from "Greg A. Woods" at
"May 29, 2000 06:52:27 pm"
To: North America Network Operators Group Mailing List <nanog@merit.edu>
Date: Mon, 29 May 2000 19:32:08 -0600 (MDT)
Reply-To: rmk@rmkhome.com
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Greg A. Woods said:
>AT&T System Vr4 (and thus SunOS-5.x) still calls uid_t just a "long" so
>it's only good for 2^31 users on 32-bit system, making 32-bit 4.4BSD
>boxes ~2 billion (and that's an American Billion!) times better than
>32-bit SunOS-5 boxes! ;-) [and 64-bit 4.4BSD boxes are "about"
>16140901064495857664 times better than 64-bit SunOS-5 boxes! 2^ ;-)]
And meanwhile, SCO Open Desktop and SCO UNIX had a limit of 65k uids,
as well as a mechanism that tried to keep sysadmins from reusing the
uids of old users.
>On machines which do not use a hashed database (dbm, db, etc.) for
>/etc/passwd (eg. un-adorned SunOS-5.x not using NIS+) there may be some
>issue with having more than say 20-30 thousand users. More CPU and RAM
>will offset this limit somewhat of course.
AIX 4.x ships with NIS that won't support a passwd file greater than
10k users.
--
Rick Kelly rmk@rmkhome.com www.rmkhome.com
